S2 High Hardness Alloy Steel Material Hardness up to to HRC60, stronger than CRV material. Don&39;t worry about wearing out after a certain period of use. Screw head material hardness: Hardness: S2 CR-V General Steel.Multi-functionThe tool set includes 56 screwdriver bits for maintenance of various devices such as iPad, iPhone, tablet, laptop, PC, smartphone, watch , glasses, camera, PS4 / Xbox, switches and other electronic devices.Flexible Rod If the screws you need to handle are hidden in the corners, back or other fronts , the flexible rod can be bent in any direction you want.Ergonomic Push DesignThere is a PUSS TO OPEN button near the switch. As long as you press on it, a whole series of screw heads will rise up so you can easily grab one. Once removed, push the entire row of screwdriver bits to retract them.Portable 56 bits and 4 tools are housed in one small box. Each type of stacking head has a corresponding card position, and the marking is clear and convenient for loading.Packaged quantity: 1 piece